import Vue from 'vue'
import VueRouter from 'vue-router'
// 引入组件
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'

Vue.use(VueRouter)

const routes = [
  // 实现根路由直接指向login
  {
    path: '/', redirect: '/login',
  },
  {
    // 增加路由
    path: '/login', component: Login,
  },
  {
    path: '/home', component: Home,
  },

]

const router = new VueRouter({
  routes,
})

// 挂载路由导航守卫
router.beforeEach((to, from, next) => {
  // to 将要访问的路径
  // from 代表从哪个路径跳转而来
  // next 是一个函数 ,表示放行
  //  next() 直接放行    next('/login') 强制跳转
  if (to.path === '/login') return next()
  // 获取token
  const tokenStr = window.sessionStorage.getItem('token')
  if (!tokenStr) return next('/login')
  next()
})

export default router
